Nicolai is a distinctive boys' name in United States, ranking #2246 in 2009 with 59 recorded births. The name reached its all-time peak in 2015 with 78 births ranking #1883. Since 1996, the popularity has increased by 156.5%. In 2009, approximately 1 in every 33,615 boys born was named Nicolai. STABLE Recent data shows the name is currently stable.